In dealing with correct right hand position, you must first consider the right arm and its relaxation and resting place on the guitar’s body.
The right arm must be considered a dead weight, i.e., shoulder relaxed with the arm resting on the front edge of the guitar just forward of the elbow joint. Allowing for slight differences in arm length, the forearm rests on a point just backward of an imaginary line drawn from the bridge as seen in (photo. 7). With the arm in this position; relax the right hand and grip the strings just back of the soundhole.
The consequences of incorrect arm placement, can be seen in (photos 8 & 9).